Ellen Swallow Richards is considered one of the founders of ecology and environmental engineering and developed her work in the analysis of air, water and soil. She was a contemporary of scientists such as Maire Curie, winner of the Nobel Prize in Chemistry, Mary Waton (1827- c.1900), engineer and inventor, pioneer in the fight for the environment, atmospheric pollution and noise pollution, who invented different systems to alleviate pollution in large cities, Eunice Foote (1819-1888) who, from her kitchen, was the first scientist to theorise about the relationship between the concentration of atmospheric carbon dioxide (CO₂) and significant global warming. Her scientific activity, like that of Eunice Foote, Anita Conti and Rachel Carlson, was always governed by her concern for the environment.
Her predecessors were: the naturalist Maria Sybilla Merian (1647-1717), the anatomy teacher Anna Morandi Manzolini (1716-1774). Laura Bassi (1711-1778) promoted the constitution of a network of experimenters that connected Italy with the scientific culture of France and England.
Heirs to this work in engineering and environmental awareness we can find the scientist Rachel Carlson (1907-1964), marine biologist, zoologist and writer, dedicated herself to the observation of her natural environment and concluded after several studies that pesticides were destroying it, the Hungarian Mária Telkes (1900-1995), considered the pioneer of solar energy. She designed the first solar-heated house, the Dover Solar House in Massachusetts (USA). She also devised the first thermoelectric refrigerator and the first solar storage systems. Ruzena Bajcsy (1933 - ) also holds a PhD in electrical engineering and computer science, and is a leading researcher in robotics, artificial intelligence and computer vision.
In the 21st century, environmental activism has been spearheaded by the young Greta Thunberg (2003- ) a Swedish activist, focusing on the risks posed by global warming and environmental activism.