Presented by: Abdul Wajid Course: Evs Dept: BBA

Global Warming

 

Contents

Introduction CausesProblems SolutionsMy opinion Question

session.

Global warming is an increase in the average temperature of Earth's surface. Since the late 1800's, the global average temperature has increased about 0.7 to 1.4 degrees F (0.4 to 0.8 degrees C). Many experts estimate that the average temperature will rise an additional 2.5 to 10.4 degrees F (1.4 to 5.8 degrees C) by 2100. That rate of increase would be much larger than most past rates of increase.

Global Warming

Causes of global warming

POPULATION INCREASE

DEFORESTATION

Portage Glacier

Alaska

1914 2004

Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org

Colorado River Arizona

June 2002 Dec 2003

How Global Warming Works

Fossil fuels (coal, oil, natural gas)

Carbon Dioxide (CO2)

Greenhouse gases

Problems: Harm to ocean life

Changes of habitat

Weather damage

The Sun’s energy passes through the car’s windshield.

This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.

Example Example of the Greenhouse Effect

CO2 Pollution and Global WarmingFinding the source of increased CO2 in the

atmosphere Some scientists have suggested that when the earth was new (about 4.5 billion years ago), CO2 may have made up as much as 80% of the

earth's atmosphere. About 2 billion years ago, the concentration of CO2

was likely 20 or 30%. Human life and even most life could not have survived in such an atmosphere. With the evolution of photosynthesizing plants, the concentration of CO2 dropped and the

percentage of oxygen in the atmosphere increased.

Remember that in photosynthesis: CO2 +H2O + energy from sun ==> O2 + sugar

Both plants and animals undergo respiration in which Sugar + O2 ==> CO2 +H20 + energy

In addition, when plants and animals die, the dead organisms decay and give off CO2.

Solutions

Simple solution × Reduce greenhouse gases emission

Stop dependency on fossil fuels× Renewable energy

→Solar energy, wind energy and biomass energy

Green areas× Plant more trees

Individual solutions

Spread awareness Turn off your computer or

the TV when you’re not using it.

Plant more trees

CONSUME MUCH MORE ON…

Solar PowerWind Power

And also don’t forget fuel efficient cars…

2007Reductions in CO2

Per Year

Gig

ato

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Carb

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Produce electricity efficientlyUse electricity efficientlyVehicle efficiencySolar and Wind PowerBiofuelsCarbon capture and storage

Billion

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f M

etr

ic T

on

s

Carb

on

Our Goal

Save EARTH before its too late…