Environmental groups in America have marked 'Earth Day' (April 22nd) by demanding that the Bush Administration do more to combat the problem of air pollution and excessive automotive emissions.

Activists have criticised President Bush and the Environmental Protection Agency (EPA) for what they believe to be concessions to Republican supporters in industry.

The founder of Earth Day, which has gained popularity and prominence since its inception 33 years ago, was among those who argued President Bush has not done enough to halt emissions.

Former Wisconsin senator Gaylord Nelson, who first began the movement in 1970, said he was now lobbying Congress for monthly hearings on the environment and wants the White House to initiate an annual State of the Environment address to the nation.

However, President Bush insisted advances were being made: 'Three decades after the first Earth Day, our air is cleaner, our water is purer, and our lands and natural resources are better protected.'

With Democratic presidential candidates signalling they intend to make the environment a major issue in the next election it looks likely that debate concerning emission control will continue.