5.1 Describe how glasshouses and polythene tunnels can be used to increase the yield of certain crops

• Solar radiation - source of energy of light. Glasehouses which is all surfaces is glass and allowed light to pass through.
• Light absorb by the surfaces inside the glass house which is soil.
• The surfaces would re emitted as heat, heats warm the air.
• The warm air is kinetic energy and the temperature increases.
• The warm air would be trap.