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Реферат Ecological problems. Environmental protection





a StereoWash or Dry Clothes

Use a Dish WasherMicrowave a Meal

... you are helping to send greenhouse gas into the air.


To perform many of these functions, you need to use electricity. Electricity comes from power plants. Most power plants use coal and oil to make electricity. Burning coal and oil produces greenhouse gases.


Other things we do send greenhouse gases into the air


The trash that we send to landfills produces a greenhouse gas called methane. Methane is also produced by the animals we raise for dairy and meat products and when we take coal out of the ground. Whenever we drive or ride in a car, we are adding greenhouse gases to the atmosphere. And, when factories make the things that we buy and use everyday, they too are sending greenhouse gases into the air.


And now let's talk about Climate and Weather

Weather is all around us. Weather may be one of the first things you notice after you wake up. Changes are, if it is cold and snowing, you'll wear a jacket when you go outside. If it's hot and sunny, you may wear shorts. Sounds pretty simple, right?

But what about climate? How is it different from weather? And what is weather, exactly? br/>

Weather

Weather describes whatever is happening outdoors in a given place at a given time. Weather is what happens from minute to minute. The weather can change a lot within a very short time. For example, it may rain for an hour and then become sunny and clear. Weather is what we hear about on the television news every night. Weather includes daily changes in precipitation, barometric pressure, temperature, and wind conditions in a given location.

Climate

Climate describes the total of all weather occurring over a period of years in a given place. This includes average weather conditions, regular weather sequences (Like winter, spring, summer, and fall), and special weather events (like tornadoes and floods). Climate tells us what it's usually like in the place where you live. San Diego is known as having a mild climate, New Orleans a humid climate, Buffalo a snowy climate, and Seattle a rainy climate.


Is the climate warming


Global surface temperatures have increased about 0.6 В° C (plus or minus 0.2 В° C) since the late-19th century, and about one half degree F (0.2 to 0.3 В° C) over the past 25 years (the period with the most credible data). The warming has not been globally uniform. Some areas (including parts of the southeastern US) have cooled. The recent warmth has been greatest over N. America and Eurasia between 40 and 70 В° N. Warming, assisted by the record El Nino of 1997-1998, has continued right up to the present. Linear trends can vary greatly depending on the period over which they are computed. Temperature trends in the lower troposphere (between about 2,...


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