If he...
If he dries his clothes outside, he'll conserve energy.
If we...
If we dry our clothes outside, we'll conserve energy.
If he...
If he uses energy-saving light bulbs, he'll conserve energy.
If we...
If we use energy-saving light bulbs, we'll conserve energy.
If they...
If they grow their own vegetable, they'll conserve energy.
If we...
If we grow our own vegetables, we'll conserve energy.
If we...
If we take public transportation, we'll conserve energy.
If we...
If we take public transportation, we'll conserve energy.
If she...
If she takes reusable shopping bags, she'll conserve energy.
If we...
If we take reusable shopping bags, we'll conserve energy.
If we...
If we choose a cold-wash, we'll conserve energy.
If we...
If we install an energy-efficient air-conditioner, we'll conserve energy.
If we...
If we use energy-saving light bulbs, we'll conserve energy.
If we...
If we keep the heater on low, we'll conserve energy.
If we...
If we unplug our chargers, we'll conserve energy.
If he...
If he installs a low-flow shower head, he'll conserve water.
