List any two adverse effects of particulate matter on human health.
The fine particulate (PM of size 2.5 œm or less) can problems cause
(i) Breathing and respiratory
(ii) Irritation
(iii) Inflammations
(iv) Damage to the lungs and premature death
What is the raw material for polyblend?
Polyblends are natural man made fibres, made by the mixture of two or more polymers especially plastic waste products
Blends of polyblend and bitumen, when used, help to increase road life by a factor of three. What is the reason?
Polyblend is a fine powder of recycled modified plastic. The binding property of plastic makes the road last longer besides giving added strength to withstand more loads.
This is because
(i) Plastic increases the melting point of the bitumen which would prevent it from melting in India's hot and extremely humid climate, where temperature frequently cross $50^{\circ} \mathrm{C}$.
(ii) Rainwater will not seep through because of the plastic in the tar.
Name an industry which can cause both air and thermal pollution and as well as eutrophication.
Chemical fertiliser unit, thermal power plant, refineries, smelting and metallurgical processing units steel mills, and the industries using steam or water as coolant causes both air and thermal pollution. The chemical release form these Industries (if rich in nitrogen and phosphorus) may result in eutrophication.