The emissions from cars are responsible for a lot of our air pollution.
The government has passed legislation to reduce the pollution caused by factory emissions by 15% over the next five years.
Many people have realized that the emissions from cars are harmful to the environment,
and are taking steps to reduce their use of their own cars.
The emission of warm water from the power plant keeps the river from freezing.
There was a sticky emission from the place where the tree branch had been cut.
Mr. Suzuki noticed the emission of a pleasant odor from the
woven mat on the floor.
Harry's cat emitted a screech when he stepped on its tail.
Beluga whales emit a clicking sound, which they use to locate food by listening to the echo of these sounds off objects in the water.
Some frogs can emit a loud screech when
attacked.
This whistle emits sounds which cannot be heard by the human ear.
X-ray machines emit radiation, so exposure should be limited.
Ronald Reagan once suggested, "Approximately 80% of our air pollution stems from hydrocarbons released by vegetation, so let's not go overboard in setting and enforcing tough emission standards from man-made sources."
Former Vice-President Al Gore was so convinced that humans are warming the planet that he advocated an international treaty committing America to drastically reduce emissions from oil, gas and coal.
In 1994, delegates from 130 countries agreed at a U.N. conference that there must be new cuts in greenhouse gas emissions to stop global warming.
Global warming is caused by rising atmospheric greenhouse gases as a result of emissions from cars, factories and power plants.