Because it's good advertising and greentech is big business. Companies also want to be seen as being progressive and at the forefront of trends. Also, petrolhe

Because it's good advertising and greentech is big business. Companies also want to be seen as being progressive and at the forefront of trends. Also, petrolheads aren't the most environmentally conscious so F1 is being a good citizen of the world by promoting green tech. Even if it's very much do as I say not as I do.