What Is Global Warming?

Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.


What Are Greenhouse Gases

Greenhouse gases are gases in an atmosphere that absorb and emit radiation within the thermal infrared range.Common greenhouse gases in the Earth's atmosphere include water vapor, carbon dioxide, methane, nitrous oxide, ozone, and chlorofluorocarbons.



Causes Of Global Warming

Almost 100% of the observed temperature increase over the last 50 years has been due to the increase in the atmosphere of greenhouse gas concentrations like water vapour, carbon dioxide (CO2), methane and ozone. Greenhouse gases are those gases that contribute to the greenhouse effect (see below). The largest contributing source of greenhouse gas is the burning of fossil fuels leading to the emission of carbon dioxide.


Effects Of Global Warming

There are two major effects of global warming:

Increase of temperature on the earth by about 3° to 5° C (34° to 41° Fahrenheit) by the year 2100.
Rise of sea levels by at least 25 meters (82 feet) by the year 2100.

Consequences of Global Warming

temperature due to Global Warming is known to be supportive to various viral diseases like the west nile virus and malaria. This will result in economic as well as health effects on human beings. For example, Global Warming will increase the incidence of such diseases in poorer countries where these diseases exist. Global Warming will also cause countries who have eradicated these diseases to spend more on vaccinations and other ways of eradication like pesticides, etc.


ways to reduce global warming in Hillgrove Secondary School

Use Less Heat and Air Conditioning
Adding insulation to your walls and attic, and installing weather stripping or caulking around doors and windows can lower your heating costs more than 25 percent, by reducing the amount of energy you need to heat and cool your home.

Turn down the heat while you're sleeping at night or away during the day, and keep temperatures moderate at all times. Setting your thermostat just 2 degrees lower in winter and higher in summer could save about 2,000 pounds of carbon dioxide each year.
Change a Light Bulb
Wherever practical, replace regular light bulbs with compact fluorescent light (CFL) bulbs. Replacing just one 60-watt incandescent light bulb with a CFL will save you $30 over the life of the bulb. CFLs also last 10 times longer than incandescent bulbs, use two-thirds less energy, and give off 70 percent less heat.