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Sachin Tendulkar became the first cricketer to get a 200 in ODIs scoring unbeaten 200 off 147 balls against South Africa in Gwalior.India won the match by 153 runs.

Kathryn Bigelow makes history at Oscars by winning Best Director trophy for the movie The Hurt Locker

The Women's Reservation Bill has been finally passed in the Rajya Sabha after opposition from some of the parties.

Indian opener Virender Sehwag became 'Wisden Cricketer of the Year'for the second time in a row beating off competition from England capital Andrew Strauss and Sri Lankan Tilakaratne Dilshan.

Spain became the World Football Champions after defeating Holland in the final match played on 10th July.

MS Dhoni Indian cricket captain has snapped up a three year deal with sports and talent management firms Rhiti Sports Management and Mindscapes worth Rs 200 crore.

Saina Nehwal becomes World No 2 in Badminton.

Sri Lankan off-spinner Muttiah Muralitharan became the first bowler to take 800 test wickets reaching the mildstone in the last test against India of his illustrious career.

Tiger Woods is still the highest earner in the world of sports with an earning of $90,508,163

Batting maestro Sachin Tendulkar hit his 48th Test hundred to lead the Indian fightback on 3rd day of the second test against Sri Lanka in Colombo.

World No 2 Saina Nehwal selected to get Khel Ratna award.

Indian women's 4X400m relay team scripted history by winning the 13th gold for India at the ongoing 16th Asian Games in Guangzhou, China.

Indian men's and women's kabaddi teams maintained their supremacy by clinching the gold as India created history by recording their best-ever medal tally in the Asian Games by adding six more medals on a productive 14th day of competitions on Friday

Hurdlers Joseph Abraham and Ashwini Chidananda provided a huge boost to the country's medal haul in the 16th Asian Games with their gold-winning feats while teen sensation Vikas Krishan bagged a boxing gold

Boxer Vijender Singh wins 14th gold for India at Asian Games by clinching the 75kg weight category title.

Wimbledon Champion Novak Djokovic rose to NO 1 in the ATP rankings for the first time while Serena Williams dropped to 175th on the WTA list ,her lowest spot since 1997.

10 Congress MPs and 39 MLAs including 11 ministers and 34 TDP MLAs resigned over Telangana issue in Andhra Pradesh assembly.

Anna's fast ended after 12 days.Victory for people.

Home >> Social Studies >> Air Pollution

Air Pollution

The mixing of harmful gases and other particles in the air is called air pollution.Polluted air affects our health.Some substances which cause air pollution come from natural sources.Sandstorms,volcanic eruptions,forest fires and pollens from plants and flowers are natural causes of air pollution.Pollen irritates the eye and the respiratory organs.The main cause of air pollution are human activities.Smoke from factories,vehicles and the burning of fuels pollute the air around us.The pollutionts sometimes combine with natural substances to cause great harm.Air pollution also harms the plants.Due to the presence of pollutants in the air,most plants are unable to prepare the food properly and it slows down their growth.

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