Microplastics and nanoplastics are so small and lightweight they can be swept into the air, where they may be helping to heat ...

The expansion includes increasing the number of hidden cameras and creating a grant program for neighborhood groups to ...

As the city continues its efforts to reduce emissions and improve air quality, the first two electric trash trucks have been ...

Lake Tahoe cleanup leaders say a solar-powered sand-sifting robot is revealing and removing hidden litter beneath beaches.