Environmental Science
Who had stated in the Stockholm Conference in 1972 that poverty was the greatest polluter?

Jawaharlal Nehru
Mahatma Gandhi
Indira Gandhi
Rajiv Gandhi

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Environmental Science
How do red and blue light differ?

Blue light has a higher speed of propagation.
The wavelength of red light is longer.
Red and blue light have different directions of polarization.
Red light has a higher intensity.

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