1/4 of the world's carbon dioxide emissions are from America: its per-capita emissions are also the greatest in the world.

Carbon monoxide is a poisonous substance formed by the incomplete combustion of carbon compounds.

Despite the problems of excessive commercialization, etc. the Olympics will go forward into the new century.

Although an increase of unmarried mothers is needed in order to escape the declining birth rate for some reason public opinion in Japan is avoiding this argument.

Central to this issue is the problem of modernization.

Massive amounts of carbon dioxide are generated every day.

Do you know anything about complex carbohydrates?

The trend towards late marriage is going to increase more and more.

Thanks to a fundamental restructuring, our surplus has swelled three-fold.

Tropical rainforests produce oxygen and consume carbon dioxide.

Japan is trying to cope with the aging of its population.

Japan has undergone a drastic change as a result of industrialization.

Physical changes are directly related to aging.

Carbon dioxide is not a poison in itself.

The amount of carbon dioxide has increased by 10 percent.

Carbon dioxide sometimes harms people.

Urbanization is encroaching on rural life.

Global warming can cause serious problems for wild animals, too.

It is said that global warming is directly related to carbon dioxide emissions.

Global warming will change the patterns of the weather world-wide.