Jeffrey Sachs is a professor and director of the Center for Sustainable Development at Columbia University. The opinions expressed in this commentary are those of the author; view more opinion articles on CNN.

(CNN) President Donald Trump, Florida Gov. Rick Scott, Florida Sen. Marco Rubio, and others who oppose action to address human-induced climate change should be held accountable for climate crimes against humanity. They are the authors and agents of systematic policies that deny basic human rights to their own citizens and people around the world, including the rights to life, health, and property. These politicians have blood on their hands, and the death toll continues to rise.

Trump remains in willful denial of the thousands of deaths caused by his government's inept, under-funded, and under-motivated response to Hurricane Maria in Puerto Rico in 2017. The image that will remain in history is of the President gleefully throwing paper towels for a photo op as the people of Puerto Rico around him suffered and died of neglect. Last September, 2018 Hurricane Florence claimed at least 48 lives , with more likely to come in its aftermath. Soon after, Hurricane Michael claimed at least 32 lives , with more than a thousand people reportedly still missing . The final death toll will likely soar in the months ahead as the residual consequences of the storm become more clear.

As the Earth warms due to the continued burning of coal, oil, and gas, climate-related disasters that include high-intensity hurricanes, floods, droughts, extreme precipitation, forest fires, and heat waves, pose rising dangers to life and property. Hurricanes become more destructive as warmer ocean waters feed more energy to the storms. Warmer air also carries more moisture for devastating rainfalls, while rising sea levels lead to more flooding.

Yet Trump and his minions are the loyal servants of the fossil-fuel industry, which fill Republican party campaign coffers. Trump has also stalled the fight against climate change by pulling out of the Paris Agreement. The politicians thereby deprive the people of their lives and property out of profound cynicism, greed, and willful scientific ignorance.

The first job of government is to protect the public. Real protection requires climate action on several fronts: educating the public about the growing dire risks of human-induced climate change; enacting legislation and regulations to ensure that families and businesses are kept out of harm's way, for example by stopping construction in flood plains, and investing in sustainable infrastructure to counteract rising sea levels; anticipating the rising frequency of high-intensity climate-related disasters through science-based preparedness following through on properly scaled disaster-response during and after storm events; and most importantly for the future, spearheading the rapid transition to zero-carbon energy to prevent much greater calamities in the years ahead.