GREENHOUSE EFFECT

AND GLOBAL WARMING

GREENHOUSE• a glass building in which plants are grown

that need protection from cold weather.• In temperate countries: -used to grow seedlings in the late winter and

early spring.• In Tropical countries:-used by commercial plant growers to

protect flowering and ornamental plant from harsh weather conditions and insect attack.

“THE EARTH’S ATMOSPHERE IS COMPARED TO A GREENHOUSE.”

GREENHOUSE EFFECT• It is a natural process and it warms the

Earth.

SOURCES OF GREENHOUSE GASES

1. CARBON DIOXIDE• Naturally produced when people and animals breathe.• Comes from the burning of fossil fuel, solid waste,

trees and wood products• Releases when cutting down and burning trees• a result of certain chemical reactions 2. NITROUS OXIDE• emitted during agricultural and industrial activities, as

well as during combustion of fossil fuels and solid waste.

SOURCES OF GREENHOUSE GASES

3. METHANE• Comes from grazing animals as they digest their

food and from decaying matter in wet rice fields.• Can also be released from buried waste• Coal mining also produces methane

4. OZONE• Naturally present in the stratosphere.

SOURCES OF GREENHOUSE GASES

5. CHLOROFLUOROCARBONS (CFC)

• Have been used in spray cans as propellants, in refrigerators as refrigerants, and in making foam plastics as foaming agents.

• It become dangerous when released into the atmosphere, depleting the ozone layer.

GLOBAL WARMING--increasing temperature phenomenon.

The thicker layer of

greenhouse gases traps

more heat

GLOBAL WARMINGIt is already

changing climates around the globe causing stronger

typhoons, and creating many health-related

problems

STEPS TO REDUCE GLOBAL WARMING

1. Plant more trees2. Reduce, reuse, recycle3. Use less hot water4. Turn off electronic

devices when not in use5. Spread awareness