41.   The rewards are exercise, emotional therapy and the opportunities for getting close to nature and improving the environment.

42.   Their new tack is to give beavers good PR by educating residents about how the animals improve the environment.

43.   They also fear that critics of regulation, if not Dow itself, will trumpet the success as an argument for depending on voluntary measures to improve the environment.

44.   They can improve the environment in parks, forests and wetlands.

45.   They said the money would better be spent to eradicate poverty or improve the environment in other parts of China.

46.   They see rapid growth built on technologies like fuel cells and genetic engineering as capable of improving the environment rather than degrading it.

47.   Yes, we should improve our environment.

48.   Yet improving office environments is tricky because there is no consensus on how best to fit the work environment to the workers.

49.   Both leaders also discussed trade, with Putin saying a new tax system and customs duties should improve the environment.

50.   Bush vowed to negotiate treaties that protect businesses and improve the environment, human rights and the lives of children.