GLOBAL

ENVIRONMENT

AL PROBLEMS

Weather is the condition of the Atmosphere at a given place or time.

It is very dynamic for it may change several times even in a day.

Average weather conditions, showing uniformity over a period of few months may be describe as a seasons.

Climate is the average weather condition or Atmospheric conditions of an area over a considerable period of time.

For climate averages, a minimum period of 35 years is desirable

Thus the climate is the same over large areas & it does not change often.

Elements of weather & climate

Temperature

Pressure

Wind direction and velocity

Humidity

Cloud cover

Precipitation

Sunshine

Climate change is a change in the statistical distribution of weather over periods of time that range from decades to millions of years.

It can be a change in the average weather or a change in the distribution of weather events around an average (for example, greater or fewer extreme natural events

Climate change may be limited to a specific region, or may occur across the whole Earth.

In recent usage, especially in the context of environmental policy, climate change usually refers to changes in modern climate.

It may be qualified as anthropogenic climate change, more generally known as "global warming" or "anthropogenic global warming" (AGW).

Global worming

There are five gases which are mainly

responsible for the green house effect and

global warming. These gases are-

Carbon dioxide (CO2) 55%

Methane (CH4) 15%

Nitrogen oxide (NO2) 6%

Chlorofluro carbons (CFC) 24%

Water vapour

Natural causes

Continental drift

Volcanoes

The earth's tilt

Ocean current

Variations in the Earth's

Orbital Characteristics

Human causes

Greenhouse gases and their sources

How we all contribute every day

Atmospheric Carbon Dioxide Variations

Industrialization

Carbon dioxide

Use of AC/fan etc. electric goods

Deforestation

Utilization of chemicals and fertilization

Release of gases from Brick field

Vehicle gas or dust