"As an investor, it's about taking out money out of funding climate pollution and supporting climate solutions... choose a fossil free bank... divest any personal investment, retirement funds, etc. out of funding fossil fuels." 

Kimberly Nicholas

This can feel like a daunting prospect, but there are resources to help you navigate this process. 

Bank Green is a non-profit that has data on many major banks and their involvement with the fossil fuel industry. See where your bank puts its money and find alternative banks that are more environmentally conscious. Divestment is a concrete way to ensure you are not (indirectly) funding the climate crisis.