In 2008, Canada became the first country in the world to enact a climate act by passing `The Climate Change Accountability Bill`. This bill was put into place to hold the government accountable in implementing measures to reduce greenhouse gas emissions. Therefore, option 2 is the correct answer.

Now, let`s consider the other options.

Option 1, Australia, has implemented various environmental policies, but it is not the first country to enact a climate act.

Option 3, Germany, is known for its strong environmental policies and initiatives, but it did not pass `The Climate Change Accountability Bill`.

Option 4, Japan, while being an active member of international climate change talks, it did not enact a climate act in 2008, and certainly not the first.

While all these countries have contributed to global climate change initiatives, the description given in the question best fits Canada.