With reference to the recent environmental policies and the impact of methane, consider the following statements:

1. Denmark will tax livestock farmers for the greenhouse gases emitted by their cows, sheep, and pigs from 2030.

2. The aim of this tax is to reduce Danish greenhouse gas emissions by 70 percent from 1990 levels by 2030.

3. Methane traps about 87 times more heat on a 20-year timescale compared to carbon dioxide. 

Which of the statements given above is/are correct?