Quebec is one of the world’s worst culprits for acid rain, says a United Nations agency that is monitoring the problem.

A world-wide campaign to reduce acid rain is helping clean up Europe, but much of Canada and the U.S. hasn’t shown any progress and the pollution is getting worse in some places.

There was no reduction in acid rain in Quebec, the Adirondacks in the U.S. North-East, parts of the U.S. Mid-West and Britain. In these areas, acidity in rivers and lakes is stable or rising, even though acid rain has been reduced by half around the world since 1990.

Acid rain is caused by industrial pollution and increases the acidity of water, killing fish and plant life. Entire lakes in Quebec are dead because of the pollution.