Things can feel pretty bleak on a gray, rainy afternoon in late December as one considers the impact our greenhouse gas emissions will have on the planet for the generations ahead. It’s important to keep in mind, however, that we are making progress.

Although it certainly has its flaws, including the lack of any legally binding commitments, the climate agreement reached in Paris earlier this month by nearly 200 countries is historic, marking the most significant progress yet made in the effort to reduce greenhouse gas emissions.

After years of obstructionism, the U.S. actually played a positive role in the Paris talks. In the run up to COP 21, President Obama set the tone for the negotiations by exercising his executive authority to reject the Keystone XL pipeline and announcing the Clean Power Plan, a crucial step to reduce carbon pollution from power plants

At the same time, China is moving forward decisively to reduce emissions from coal and renewable energy has become an economically viable alternative to fossil fuels. Government investigations into Exxon’s cover up of its own climate research have clearly put the oil industry on the defensive and the divestment movement gathers increasing momentum.

Closer to home, as the talks in Paris got underway, Gov. Andrew Cuomo issued a directive that 50 percent of electricity generated in our state come from renewable technologies by 2030. This mandate sends a strong signal that New York needs to accelerate its transition to renewable energy.

In the last 10 years, New York’s renewable energy has increased from about 19 percent to 25 percent of total electricity use. The state’s renewable portfolio standard, which expires today, helped make this possible. Now the challenge is clear: we need double the share of renewable energy to 50 percent in the next 15 years.