Introduction and meaning: The rise in earth’s surface temperature as a consequence of greenhouse effect is called Global Warming.
The greenhouse gases such as carbon-dioxide and other pollutants absorbs more heat from the sun then it radiates back. This causes an increase in the intensity of heat in atmosphere.
The thickening of earth atmosphere because of presence of increased carbon dioxide and other greenhouse gases is called greenhouse effect.
What causes Global Warming?
1. Deforestation and industrial emissions result to an increase greenhouse gases (such as carbon-dioxide) around earth’s atmosphere.
2. These greenhouse gases traps and absorbs atmospheric heat and ultimately causes Global warming (an increase earth’s surface temperature).
Effects / Impact of Global Warming
If Global warming continues the world would be in danger. The major effects and impacts of Global Warming are:
1. Climate Change: Global warming is causing climate change. The world’s is becoming warmer and warmer. There is also prediction of regional climate changes along the ecosystem.
2. Sea Level Change: One major consequence of global warming arising out of greenhouse effect is the rise in sea level. Four major changes take place prior to this. They are: Thermal expansion, mountain glacier melting, Greenland ice sheet melting and Polar (Arctic and Antarctic) ice sheet melting. Thus, the coastal cities and ports may be submerged under sea-water. Many islands may vanish from the earth surface as well as from the world map.
3. Water Balance: Although changes in sea-level have received much publicity, problems of water availability are likely to be more serious and perhaps more expensive to solve. In future, warmer world will face water crisis in some parts while in other regions it will be wetter than it is now.
There is uncertainty regarding regional forecasts of future precipitation as warming of globe makes it difficult to predict. Also, pattern of agricultural changes, or effects on ecosystems in general are fairly unpredictable.
4. Human Health: The human health is put at risk because of Global warming. In recent years, there have been newer reports of spread of major tropical diseases with changing climate. As the earth becomes warmer, more and more people are likely to be affected by tropical diseases.
How to prevent Global Warming?
The problem of Global Warming can be controlled by minimizing the emission of greenhouse gases into the environment. The following preventive steps would help save the earth from the harmful effects of Global Warming.
- Laws. The Laws that governs pollution and greenhouse gases should be followed.
- Reduction in thermal power generating stations. Reduced dependence on thermal power for our electricity need would help towards reducing the quantity if carbon dioxide in the environment. The use of fossil fuels for generating conventional energy is a major of greenhouse gases.
- We should not waste paper. We can save paper by keeping documents in electronic format and by not printing emails.
- Planting Trees. Trees absorb carbon dioxide and releases oxygen. Trees are helpful in reducing the problem of global warming.
- Sharing our car. We can share our car while going to office or performing other scheduled activities. On one hand, we will save money, and on the other, we will emit less greenhouse gases.
Category: Environment, Essays, Paragraphs and Articles
Humans use water for everything from drinking and bathing to growing crops, supporting livestock and fish farms, shipping goods, generating electricity, and simply relaxing and having fun. Yet climate change is producing profound changes in this precious commodity, threatening water availability, access, and even quality.
- Decline in drinking water—both quantity and quality—is expected for these reasons:
► Municipal sewer systems may overflow during extreme rainfall events, gushing untreated sewage into drinking water supplies.
► Loss of mountain snowpack and earlier spring snowmelt spurred by higher temperatures reduce the availability of drinking water downstream.
► The shrinking of mountain glaciers threatens drinking water supplies for millions of people.
► Sea-level rise can lead to saltwater intrusion into groundwater drinking supplies, especially in low-lying, gently sloping coastal areas.
- Decline in irrigation supplies. Loss of mountain snowpack reduces the amount of water available for irrigation downstream, while earlier spring snowmelt affects the timing. Saltwater intrusion may contaminate the supply from groundwater.
- Higher shipping costs. Lower lake and river levels may reduce the capacity of ships to carry freight safely due to the danger of their running aground or preclude the use of large ships altogether—both of which may increase shipping costs for food and other commodities.
- Disruptions to power supply. Lower lake and river levels may threaten the capacity of hydroelectric plants, while higher temperatures may mean that water is too warm to cool coal and nuclear power plants, leading to power brownouts. Shrinking mountain glaciers threaten electricity generation as well.
- Effects on recreation. Reduced snowpack and earlier spring snowmelt put traditional winter sports, such as skiing and snowmobiling, at risk, while lower water levels in lakes and rivers increase the costs of maintaining recreational amenities such as pleasure boat docks and even beaches.