لخّصلي

Climate is the long-term pattern of weather in a particular area.Changes in greenhouse gases, like carbon dioxide, water vapor, and other gases, in the atmosphere also impact climate change.Trees absorb carbon dioxide, so cutting down forests for timber or development contributes to the greenhouse effect.Some human activities release greenhouse gases--burning fossil fuels for transportation and electricity, or using agricultural technology that increases meat production, for instance.However, adding too many of these gases to the atmosphere can intensify the greenhouse effect and slowly make the Earth warmer.As climates change, organisms that live in the area must adapt, relocate, or risk going extinct.The greenhouse effect happens when these gases in the atmosphere absorb some of the sun's heat as it is radiated back from the surface of Earth.For periods of 30 years or more, however, distinct weather patterns occur.A desert might experience a rainy week, but over the long term, the region receives very little rainfall.Greenhouse gases trap the sun's heat in Earth's atmosphere, causing temperatures on the planet surface to rise.So do factories that emit pollutants into the atmosphere.It has a dry climate.This keeps Earth warm.

Climate is the long-term pattern of weather in a particular area. Weather can change from hour to hour, day to day, month to month or even from year to year. For periods of 30 years or more, however, distinct weather patterns occur. A desert might experience a rainy week, but over the long term, the region receives very little rainfall. It has a dry climate.

Climates do change, however—they just change very slowly, over hundreds or even thousands of years. As climates change, organisms that live in the area must adapt, relocate, or risk going extinct.

Changes in greenhouse gases, like carbon dioxide, water vapor, and other gases, in the atmosphere also impact climate change. The greenhouse effect happens when these gases in the atmosphere absorb some of the sun's heat as it is radiated back from the surface of Earth. Greenhouse gases trap the sun's heat in Earth's atmosphere, causing temperatures on the planet surface to rise. This keeps Earth warm.

Without any greenhouse gases in the atmosphere, most life on Earth would freeze to death. However, adding too many of these gases to the atmosphere can intensify the greenhouse effect and slowly make the Earth warmer.

Some human activities release greenhouse gases—burning fossil fuels for transportation and electricity, or using agricultural technology that increases meat production, for instance. Trees absorb carbon dioxide, so cutting down forests for timber or development contributes to the greenhouse effect. So do factories that emit pollutants into the atmosphere.

Many scientists are worried that these activities are causing dramatic and dangerous changes in Earth's climate. Average temperatures around the world have risen since about 1880, when scientists began tracking them. The seven warmest years of the 20th century occurred in the 1990s. This warming trend may be a sign that the greenhouse effect is increasing because of human activity. This climate change is often referred to as "global warming."

As climates change, so do the habitats for living things. Animals that live in an area may become threatened. Many human societies depend on specific crops for food, clothing, and trade. If the climate of an area changes, the people who live there may no longer be able to grow the crops they depend on for survival.

The temperature will continue to rise unless preventive steps are taken. Most climatologists agree that we must reduce the amount of greenhouse gases released into the atmosphere.