Environmentalists in general have been impressed by the speed and sheer sweep of Obama's efforts to leave behind the George Bush era of climate change denial
Suzanne Goldenberg, US environment correspondent
guardian.co.uk, Wednesday 29 April 2009 11.33 BST
Barack Obama promised on his very first day in the White House to help move America towards a new green future. Now, 100 days on, environmentalists in general have been impressed by the speed and sheer sweep of Obama's efforts to leave behind the George Bush era of climate change denial, and try to set in place the foundations of a low carbon future.
So how has he performed? Obama, of course, has not had time to put in place the long-term measures needed to wean America off oil and coal. His administration has also had to scale back some of its ambitions because of opposition from Congress, charged with passing cap and trade legislation, and an American public that – unlike Obama – has yet to see global warming as a priority threat.
The Senate has yet to take up climate change legislation, which sharply reduces the chances of introducing a market-based cap and trade system by the end of this year. The administration has also frustrated some environmentalists.
But most agree that Obama has moved faster, and acted across a wider, than any other president to lay the foundations of a new low-carbon economy.
Here are some of the highlights of the last 100 days:
January 20: Only hours after Obama takes the oath of office, the White House issues a memo staying a number of Bush's "midnight regulations". The regulations, issued in the final hours of the Bush administration, had sought to do away with a generation of environmental protections imposed on polluters from factory farms to the burning of hazardous waste and oil shales development. Obama orders a review of the measures, which had been deplored by conservationists.
January 26: The president signs a pair of executive orders intended to set stricter limits on car exhaust emissions. Obama directs the Environmental Protection Agency to reconsider its refusal, under George Bush, to allow California to cut car exhaust by 30%. The president also calls on the Transportation Department to draw up new fuel 35 MPG fuel standard for all cars rolling off the assembly lines from 2012.
February 17: Obama signs a $787bn economic recovery plan. The rescue package contained historic levels of green investment – well over $100bn by some estimates. There were billions for refitting existing buildings to make them more energy efficiency, high-speed rail lines and commuter transit and updating the electric grid.
"In a lot of respects the stimulus package was a gigantic climate and energy bill by itself in a very positive way," said David Gardiner, a senior adviser at the Energy Future Coalition. "We have never had a president who has focused on this ... with [that] intensity."
March 19: He pledges $2.4bn for the development of hybrid cars and advanced batteries.
March 20: Michelle Obama digs up a patch of ground behind the White House to plant the first presidential vegetable garden since the second world war. The Obamas plan to put in lettuce, spinach, herbs such as coriander, and hot peppers – but no beets because the president does not like them.
March 30: Obama sets aside 2m acres of public land spread across nine states as wilderness, from California's Sierra Nevada to Virginia's Jefferson forest, shielding it from mining, logging and other operations. Another provision protects 1,000 miles of river.
April 17: The Environmental Protection Agency formally declares that carbon dioxide and five other greenhouse gases are a danger to public health and welfare. The so-called endangerment finding is a first step towards regulating coal-fired power plants and to forcing US car manufacturers to make cleaner and more fuel-efficient vehicles.
April 27: The US hosts a two-day forum for 17 of the world's most polluting economies to try to get closer to a deal before the international climate change summit at Copenhagen in December. The secretary of state, Hillary Clinton, declares the US, after eight years of going missing under George Bush, is now committed to helping lead the world towards a planet-saving deal. She also makes a direct pitch to India and China, saying that a move towards a greener economy will not hold back development, but could help them reach greater prosperity.