Complete the summary below. Choose words and phrases from the box below the summary and write your answers in boxes 28-35 on your Answer Sheet.
Note: use each word or phrase ONCE only.
Many people are unaware of the (28) to land that salinity is causing in countries like Australia. Salinity has many causes, including (29) and short-sighted farming strategies like over-irrigation. Even though salts are present in many soils and waterways, native plants (30) to ensure that salt remained in the groundwater, under the root zones. Introduced or exotic species of plants with their different needs and plant structure, allow more (31) into the soil, causing the (32) to rise. Because salts cannot be evaporated, as they rise with the groundwater and reach the (33) the high level of salts cause salinisation. The resultant rising salt levels can have detrimental effects on all biological groups not only at the (34) . If we do not take note of the (35) the costs involved in repairing the salt damage will be considerable.
land clearing recharge zone warning signs
had evaporated salinity level European
had recharged trees had adapted
water table surface farming difficulties
habitats government water
rainwater degradation air