GLOBAL WARMING
Global WarmingGlobal Warming
•an average increase in an average increase in the temperature of the the temperature of the atmosphere near the atmosphere near the Earth’s surface and in Earth’s surface and in the troposphere, which the troposphere, which can contribute to can contribute to changes in global changes in global climate patternsclimate patterns
CausesCauses •Burning of fossil fuels Burning of fossil fuels ((Coal/Crude oil)Coal/Crude oil)
– Power plantsPower plants generate electricity generate electricity
– Transportation-----fuels for transports (E.g. LPG,Transportation-----fuels for transports (E.g. LPG, kerosene, fuel oil)kerosene, fuel oil)
– Industrial processes (E.g. manufacture of Industrial processes (E.g. manufacture of cement, steel, aluminium)cement, steel, aluminium)
• Other greenhouse gases Other greenhouse gases emissionemission
– AgricultureAgriculture– ForestryForestry– Other land usesOther land uses– Waste managementWaste management
Greenhouse gases in the atmosphereGreenhouse gases in the atmosphere
↓↓
Some infrared radiation is trapped Some infrared radiation is trapped
↓↓
Greenhouse effectGreenhouse effect
Serious greenhouse effect
Global WarmingGlobal Warming
Increase in Increase in greenhouse gasesgreenhouse gases• Concentration of greenhouse Concentration of greenhouse
gases in the atmosphere is gases in the atmosphere is highly increasing by human highly increasing by human activitiesactivities
→ → Leads to the increasing Leads to the increasing seriousness of global warmingseriousness of global warming
Increasing temperature Increasing temperature extremesextremes• Regions that have temperatures (1-Regions that have temperatures (1-
3°C) warmer than the average: 3°C) warmer than the average: – United States United States – Most of the EuropeMost of the Europe
• Regions that have temperatures (1-Regions that have temperatures (1-3°C) cooler than the average: 3°C) cooler than the average: – AustraliaAustralia
Sea level risingSea level rising
•rising at an average rate of 1 - 2 rising at an average rate of 1 - 2 mm/year over the past 100 years mm/year over the past 100 years
EnvironmentaEnvironmental and Human l and Human
EffectsEffects
Extreme EventsExtreme Events• Extreme Events: Extreme Events:
• Heat waves; Cold waves; Storms; Floods Heat waves; Cold waves; Storms; Floods and Droughts and Droughts
Global warmingGlobal warming
An increase in the frequency of extreme An increase in the frequency of extreme eventsevents
More event-related deaths, injuries, infectious More event-related deaths, injuries, infectious diseases, and stress-related disordersdiseases, and stress-related disorders
• Extreme Events: Extreme Events:
• Heat waves; Cold waves; Storms; Floods Heat waves; Cold waves; Storms; Floods and Droughts and Droughts
Global warmingGlobal warming
An increase in the frequency of extreme An increase in the frequency of extreme eventsevents
More event-related deaths, injuries, infectious More event-related deaths, injuries, infectious diseases, and stress-related disordersdiseases, and stress-related disorders
Air QualityAir QualityAn increase in the concentration An increase in the concentration
of ground-level ozone of ground-level ozone
Damage lung tissue Damage lung tissue
Harmful for those with asthma Harmful for those with asthma and other chronic lung and other chronic lung
diseases diseases
Food supplyFood supply
Rising temperatures and variable Rising temperatures and variable precipitation precipitation
Decrease the production of staple Decrease the production of staple foods in many of the poorest foods in many of the poorest
regionsregions
Increasing risks of malnutritionIncreasing risks of malnutrition
UV Exposure UV Exposure (Australia)(Australia)
• Skin Cancer Skin Cancer – an abnormal growth of skin tissues. an abnormal growth of skin tissues.
• Premature agingPremature aging– make the skin thick, wrinkled, and leathery make the skin thick, wrinkled, and leathery
Measures on controlling the Measures on controlling the problemproblem
• GovernmentGovernment
* * set some laws to limit the amount of set some laws to limit the amount of pollutants produced by factoriespollutants produced by factories
* develop the skills of using renewable * develop the skills of using renewable fuels, e.g. solar energy, wind energyfuels, e.g. solar energy, wind energy
* * encourage the factories to replace fossil encourage the factories to replace fossil fuels by renewable fuels, which would not fuels by renewable fuels, which would not cause environmental pollutioncause environmental pollution
* carry out energy saving scheme → reduce * carry out energy saving scheme → reduce the pollution produced by burning fossil the pollution produced by burning fossil fuelsfuels
* build more plants → to reduce the * build more plants → to reduce the pollutants e.g.= COpollutants e.g.= CO22
• Citizens Citizens
** reduce the use of plastic bags → as reduce the use of plastic bags → as burning plastic emit CH4burning plastic emit CH4
* recycle the resources, e.g. plastic * recycle the resources, e.g. plastic
* reduce the use of sprays → as CFCs * reduce the use of sprays → as CFCs would be emitted outwould be emitted out
** reduce the use of air-conditioner, which reduce the use of air-conditioner, which will emit CFCswill emit CFCs
* use public transportation instead of * use public transportation instead of private cars → reduce the pollutants private cars → reduce the pollutants emitted by carsemitted by cars
THE EnD MADE BY-MADE BY-BHUWAN SINGHBHUWAN SINGH
(b.TECH 1(b.TECH 1stst year) year)(brach-eee)(brach-eee)(subject=evs)(subject=evs)