 Grants of up to $10,000 are available to Iowa communities that lost trees in the 2020 derecho for planting new trees. The Iowa DNR's Ellie Jones says trees purify waterways, filter pollutants from the air, and help offset what's known as the urban heat island effect. In cities, because there's so little green space, they tend to be a lot hotter. And so since we have these really high temperatures in our cities...