They didn't use as much force with taxes and weapons were allowed
People will want to shop more and get more of the product if it's a lower price.
Tariffs on imports
The 1920s presidents began a system of tariffs on imported good to encourage spending on American goods only. However, with no trade, European countries were unable to make money.
Tariffs are taxes on imported goods. This is a common economic policy of conservatives.
The Kyoto Protocol required only developed countries to reduce emissions, while the Paris Agreement recognized that climate change is a shared problem and called on all countries to set emissions targets. So the answer is 4. Combating climate change and holding each other accountable for greenhouse gas emissions.