Type the number

Exercise and reference answers

Questions

1. Answer

   1992

   Question

   Year of the Earth Summit at Rio

2. Answer

   1997

   Question

   Year the Kyoto Protocol was agreed

3. Answer

   170

   Question

   States attending the Rio Summit

4. Answer

   1987

   Question

   Year of the Montreal Protocol

5. Answer

   64

   Question

   Per cent of known oil reserves in the Gulf

6. Answer

   1959

   Question

   Year of the Antarctic Treaty

Instructions

Type the number only.

Explanation