00:00 Acid rain was a major environmental concern in the 80s, but it has largely been addressed and improved since then.

03:53 Acid rain is a transboundary issue that occurs mainly in the Northern Hemisphere but can affect the rest of the world, and it is caused by emissions of sulfur dioxide and nitrogen oxides from cars, factories, power plants, lightning strikes, and volcanoes, which react with water vapor in the atmosphere to form sulfuric and nitric acids that can fall as wet rain, snow, sleet, fog, or be deposited as particulates in gases.

08:15 Acid rain can have a detrimental impact on ecosystems, particularly on sensitive organisms like plankton, which can lead to a domino effect of negative consequences throughout the ecosystem.

11:55 Acid rain primarily affects surface waters, such as lakes and rivers, by overloading the soil's buffering capacity and allowing un-neutralized acid to pass into the water, leading to negative impacts on organisms like plankton and causing a domino effect of ecological consequences.

16:22 Acid fog, caused by acid rain, strips trees of their leaves and can prevent them from growing in certain areas, and while humans are not as sensitive to the effects of acid rain, it can lead to respiratory problems and corrode buildings and cars.

20:33 In 1995, the Clean Air Act and Acid Rain Program successfully reduced sulfur dioxide emissions by 50% through a cap-and-trade scheme.

24:19 Cap-and-trade was a successful method for reducing sulfur dioxide and nitrogen oxide emissions, resulting in fewer acidic lakes and streams and a positive impact on the environment.

28:19 The hosts of the podcast announce that they will be presenting at Comic-Con in San Diego, but don't have all the details yet.

32:05 The hosts ask the listeners to explain the meaning of "chocolate rain" and provide contact information for the podcast.