Global Warming

Slide 1 : GLOBAL WARMING By V.S.Saravanamani Dept. of Chemistry

Slide 2 : What is Global warming? Greenhouse effect The Evidence The Effects How can you help?

What is global warming? : What is global warming? Global warming or climate change is the gradual increase of the average temperature of the Earth The average temperature of the Earth's surface is around 59°F or 13 °C. Greenhouse Gases in the atmosphere hold in heat Without these gases, the Earth’s surface temperature would drop to around 0 °F.

What is the Greenhouse Effect? : What is the Greenhouse Effect? Certain gasses in the atmosphere absorb heat energy and reduce the amount that escapes into space This ‘trapping’ of heat from our only source of warmth – the Sun – by the atmosphere is known as the ‘Greenhouse Effect’ This gives us a global average temperature of +15°C rather than -18°C if we had no Greenhouse Effect

Slide 5 :

Slide 6 : Atmosphere Supplies gases required for life Oxygen Carbon dioxide Offers protection from the sun’s ultraviolet radiation Helps control Earth’s temperature by trapping solar energy next to the surface

Slide 7 : The Atmosphere The Earth is surrounded by a thin layer of gases Oxygen Carbon Dioxide Nitrous Oxide Methane

GREEN HOUSES GASES : GREEN HOUSES GASES water vapour carbon dioxide methane nitrous oxide ozone CFCs

Water Vapour : Water Vapour Water vapour is a naturally occurring greenhouse gas and accounts for the largest percentage of the greenhouse effect, between 36% and 66% human activity does not directly affect water vapor concentrations except at local scales

Carbon Dioxide (CO2) : Carbon Dioxide (CO2) Accounts for 80% of greenhouse gases emissions Enters atmosphere by Carbon cycle Burning fossil fuels Deforestation Cement production

Methane (CH4) : Methane (CH4) A gas that is emitted from the following sources: Volcanic activity Natural gas fields Solid waste landfills Byproduct of biomass

Nitrous Oxide- N2O : Nitrous Oxide- N2O A gas that is emitted from the following sources: Burning fossil fuels Use of fertilizers Burning biomass Can be used as a mild anesthetic for minor surgeries Also known as laughing gas!!

Chlorofluorocarbons (CFCs) : Chlorofluorocarbons (CFCs) A gas is that emitted by Refrigerants Solvents Fire retardants

Mission Not Impossible : Mission Not Impossible Solar mission Energy efficiency Sustainable Habitat Water mission Sustaining Himalayas A green India Sustainable agriculture Strategic knowledge

Solar Mission : Solar Mission To promote the use of solar energy through solar photovoltaic and thermal systems for power generation. To also integrate other renewable energy technologies like biomass and wind.

Energy Efficiency : Energy Efficiency To moderate Green House Gases (GHG) through sector specific and cross cutting technology and fuel switch options. To use more LNG and biomass fuels besides seeking tech transfer.

Sustainable Habitat : Sustainable Habitat To promote energy efficiency in the residential and commercial sectors through LPG use. To better manage municipal waste and urban public transport.

Water Mission : Water Mission To promote efficient water use, augment supply in critical areas and ensure effective management of water resources To have better management of surface and groundwater. Also conserve wetlands

Sustaining Himalayas : Sustaining Himalayas To enhance monitoring and conservation of the Himalayan eco-system, empower local communities for management of ecological sources and promote sustainable tourism

A Green India : A Green India Reduce fragmentation of forests, enhance public and private investments for plantations, upscale join forestry management and promote conservation of biodiversity afforest degraded lands

Sustainable Agriculture : Sustainable Agriculture Focus on four crucial areas- dry land agriculture risk management, access to information and promoting the use of biotechnology. Also to develop drought and pest resident varieties.

Strategic Knowledge : Strategic Knowledge Research substantive domains of climate science. Have climate modeling to improve quality of projections, promote data access between ministries and have an integrated knowledge network

Slide 23 : Trees that are planted today will be growing in a higher CO2 concentration tomorrow

Slide 24 : The Evidence Before and after pictures of Green land’s disappearing glaciers

The Effects : The Effects Water levels will rise in oceans The timing of the seasons will change Increased spread of disease Stronger hurricanes and storms Animals change behavior More plant and animal species will become extinct Allergies get worse

Slide 26 : conclusion

Ten things to do : Ten things to do Replace incandescent bulbs with CFL Drive less Recycle more Check vehicle pressure for better mileage Use less hot water Cont...

Slide 28 : Avoid products with excessive packaging Plant a tree Turn off equipment not in use Electric Cars/ Hybrid Cars Use Alternative sources / Fuel

Slide 29 : Thank you for your co-operation