Plastic water tank

Simple knowledge on light tells us that black colour absorbs all the seven colours of the light spectrum causing heat production and white colour reflects all the colours of light spectrum and keeps the immediate environment cool. That is the reason why people living in a desert ecosystem wears white head to knee garments to keep them cool. For some unknown reason our rooftop water tanks are made of black plastic and during the summer days it picks up all the heat from the sun and amplify the heat several times. This magnified solar heat, especially during hot summer days, would slowly dissolve small amount of plastic into the water contained in these black water tanks. Many of us boil this water and use it for drinking. I presume over the years, continuous consumption of water from these rooftop black water tanks is going cause serious harm to our health, particularly the growing children. If we are to use plastic rooftop water tank it is better to use white water tanks which would reflect heat during the hot summer days and much lesser amount of plastic would be released into our water.
There is some concern also about using plastic kitchen-wares in the microwave oven. Whenever something is heated there is an increase likelihood of pulling chemicals out into the substrate. Chemicals can be released from plastic polycarbonate food container and plastic packaging materials used in some microwave meals. It is better to use natural materials like corelle or stonewares for oven cooking.