If the world’s population (11) continues / will continue to rise, it (12) becomes / will become more and more difficult to feed everyone. Some scientists think that genetically modified (GM) food (13) is / will be the answer. But not everyone agrees. We will need more rese, before we (14) know / will know if GM food is really safe, the say. For example,what (15) happens / will happen to ordinary plants and animals if we (16) grow / will grow GM food on our farms? The GM companies say there is no danger. They say that when farmers (17) use / will use GM crops, they (18) need / will need fewer chemicals on their farms. And if we (19) use / will use fewer chemicals, our food (20) is / will be healthier to eat.