Chemical leaching due to Microwaves

It's safer and more healthy to use heat-resistant glass or ceramic containers when heating foods in microwaves. Being conscious in the types of materials you place in a microwave is also positive in lowering greenhouse gas emissions because heating plastics releases carbon dioxides.
Heating plastic materials causes chemicals to pass into (especially fatty) foods.

Microwave in Glass

Testing has also found chemicals after normal heating of the following 'microwave safe' plastics:

BPA leaches from 'safe' products