“I did not come here to apologize,” Bush told more than 110 world leaders in his brief formal address. “We come to press on with deliberate purpose and forceful action.”

But his remarks appeared to do little to quell the discontent of presidents, prime ministers and delegates, who had hoped the summit meeting would do more to address the environmental problems that face the world.

Bush’s remarks were greeted with tepid applause that reflected the degree to which he had become the Earth Summit’s most controversial figure.

Leaders like Indian Foreign Secretary J. N. Dixit wished aloud that the President had expressed “a little more empathy for a collective approach” to the challenges at hand.

In a disappointment to those who had hoped for a last-minute American initiative, Bush instead delivered an elaborate testimonial to his faith in environmentalism but continued to fend off critics of his Administration’s controversial positions.

“It is never easy–it is never easy–to stand alone on principle,” Bush said. “But sometimes leadership requires that you do. And now is such a time.”

Bush’s comments reflected the internal strains of a White House determined to be seen to stand firm on behalf of economic growth but fearful of being perceived as standing against environmentalism.

In a small victory for William K. Reilly, the head of the U.S. delegation, Bush chose to confront the conference with a speech far less defiant than other senior U.S. advisers had advocated.

“When our children look back on this time and this place,” Bush told the summit, “they will be grateful that we met at Rio.”

Bush urged other leaders to join the United States in combatting global warming with actions instead of words. He proposed that another environmental conference be convened before the end of the year in order to talk over specific steps for each nation.

But environmentalists contended that he had merely packaged previously announced actions as a new plan.

“The most charitable thing you can say about it is the Administration believes in recycling,” said Alden Meyer of the Union of Concerned Scientists. “It’s another finger in the eye of international public opinion.”

Later in the day, to highlight the U.S. drive for a binding world agreement on forest protection, Bush toured a small Brazilian rain forest not far from the summit site. But among the United States’ critics, the Administration got little credit for the President’s $150-million forest initiative. Third World nations suggested that the United States was interested only in preventing exploitation of tropical forests while it rapidly depletes its own.

Bush’s speech brought the hustle and bustle in the huge conference complex in Rio to a halt for the first time since thousands of journalists and delegates poured in 10 days ago.

In a mood of great anticipation and unease, participants huddled around scores of television monitors in corridors and conference rooms as Bush prepared to take the stage. Hundreds of delegates who could not get into the meeting filled a cavernous conference room and watched the speech on a huge video screen.

However, like the delegates in the hall where Bush spoke, they offered applause that was a small fraction of that given to British Prime Minister John Major or Cuban President Fidel Castro. And there was a ripple of laughter when Bush proclaimed the U.S. environmental record to be “second to none.”

“Saying that no country in the world is doing as much as the United States for the environment is simply not in concert with the facts,” complained Hans Alders, head of the Dutch delegation.

And Gro Harlem Brundtland, prime minister of Norway, regretted that Bush offered “no new signals” of a willingness to assist poorer nations in coping with environmental challenges.

As expected, Bush signed a watered-down treaty designed to reduce the danger of global warming through reductions in the emissions of so-called greenhouse gases.

The Administration had refused to endorse an accord that included deadlines for action, and Bush sought to insulate himself from further criticism from European allies by inviting French conservationist Jacques Cousteau to join him at the signing.

But Bush still refused to sign a separate treaty on biodiversity aimed at conserving plants, animals and microorganisms and their habitats. That left the United States separated from all of its important allies. The President pledged that U.S. efforts in that area would “exceed” those required under the accord, but he reiterated that his Administration could not accept its limits on the biotechnology industry.

Amid the criticism of the United States, German Chancellor Helmut Kohl and Britain’s Major offered small helping hands by praising the Bush initiative designed to protect against international deforestation.

However, even Reilly, chief of the U.S. Environmental Protection Agency, acknowledged that the conference had ended with some “disappointment and discontent.” He blamed the unease on unrealistic expectations that the United States would commit to measures its economy could not sustain.

“The United States is increasing its financial assistance quite a lot,” he said. But he added that “obviously neither we nor anyone else was ready to accommodate” some Third World demands for a larger transfer of wealth.

That argument echoed the more hard-headed Administration stance adopted in recent weeks as the White House–preoccupied with the undeclared candidacy of Ross Perot–chose to confront its foreign critics with indignant isolation.

But, because some Bush aides also worried about being dealt a black eye by the environmental community, Administration officials said Reilly was able to persuade the President to adopt a “greener” and less confrontational approach than had initially been planned.

However, some American environmentalists attending the conference maintained their sharp criticism of the Administration. After Bush suggested that environmental concerns need not limit economic growth, the World Wildlife Fund’s Richard Mott complained that Bush had “misunderstood the entire tenet of the Earth Summit.”

Bush’s efforts appeared at least in part to have paid off in a meeting he held with a small group of U.S. environmental leaders Friday morning before he addressed the conference.

Although some of the leaders had been among Bush’s sharpest critics, they emerged from the session with a surprisingly upbeat assessment of the President’s eagerness to listen to their ideas.

RELATED STORIES: A22, A23

Where U.S. Stands at Rio Summit

Here is where the United States stands on the major documents being considered at the Earth Summit. The only legally binding agreements are biodiversity and global warming treaties. OPPOSES

Biodiversity: Pact to conserve plants, animals and habitats. United States, broadly criticized for being lone holdout among major nations, contends that treaty could obligate wealthy nations to provide unlimited money for conservation. It also says treaty doesn’t protect patents of biotechnology firms that develop products from abroad. ACCEPTS

Global Warming: Reduction in carbon dioxide emissions. It was watered down under U.S. pressure.

Rio Declaration: A non-binding summit statement of environmental rights and responsibilities. Accord was completed Thursday after Israel pulled back from a showdown over language in provision referring to people living under occupation.

Forestry Principles: Seventeen points outlining principles and methods to protect world’s forests. Document completed Friday, overcoming differences on drafting an international forestry convention. UNDECIDED

Agenda 21: The massive blueprint of financial sources and methods to implement Rio Declaration. The United Nations estimates that $125 billion in grants and loans will be needed. Disputes include how much money developed countries should provide and how funds would be dispersed.