Science and Technology Current Affairs – 2017

‘ Valles Marineris ‘: Largest canyon in solar system

imageMars’ Valles Marineris is the largest canyon in our solar system. It is over 4000 km long and 200 km wide, and with a depth of 10 km. This size makes it some ten times longer and five times deeper than Earth’s Grand Canyon. 

Where exactly Valles Marineris located?

  • Valles Marineris is located along the equator of Mars, on the east side of the Tharsis Bulge, and stretches for nearly a quarter of the planet’s circumference.

Where is Earth’s Grand Canyon located?

  • The Grand Canyon is a steep-sided canyon carved by the Colorado River in the United States in the state of Arizona.

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Alternatives to Endosulfan available

The Persistent Organic Pollutants (POP) Review Committee to the Stockholm Convention on Persistent Organic Pollutants approved the assessment of 100 chemical alternatives to insecticide and acaricide Endosulfan.  The committee also suggested its non-chemical alternatives.

Which of the approved alternatives are used in India?

Among the approved alternatives which are used in India, some are:-

  • Malathion
  • Aldicarb
  • Carbofuran
  • Cabaryl
  • Fipronil
  • Methyl parathion
  • Pyrethrin

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