Reusable grocery bags.
Recycling containers.
Natural Cleaning products.
Cloth diapers.

Here are a few ideas for some pictures.

You could have a picture of you walking along a busy road to show that you aren’t taking the car.

A picture of you walking out of a supermarket carrying reusable shopping bags.

A picture of you putting screwed up paper in a paper recycling bin. (just put a little label on the bin saying paper recycling bin.)

A picture of a compost heap or bin.

A picture of you wearing a jumper and having the central heating turned off.

A picture of the light switched off.

Hope these are useful! =D

Hmmm..
*A fluorescent light bulb..(the spiral kind)
*A cloth reusable bag
*A plug, out of a socket..(like unplugged, laying down next to a socket)
*A pic of a smart car
*A bag of recyclables
*A dvd of The Inconvenient Truth-A doccumentary by Al Gore about global warming
*A garden-provides flowers, vegetables, and environmental benefits. It helps to reduce soil erosion and some kinds of air pollution
*A hand holding onto balloons-when you let go of a balloon it eventually comes down and most likely into the ocean (i guess, depending on where you live) so it could sink into the ocean and make a sea animal choke (no joke)
*A pic of someone riding a bike or walking
*A pic of someone planting a tree
*A pic of someone NOT throwinng away batteries (like have them putting them into a jar)-batteries contain many hazardous materials, that cna leak into landfills when batteries are thrown away. lots of these super dangerous chemicals get into our water supply.
*A pic of someone going to a national park during an odd season..(I dont know when most people go..but anyway)-Having a buncha people go to a national park really hurts it. Many things are destroyed and stepped on because of the millions of people that go there at the same time. Its better to go off season, you kind of give the park a break in between.

Hope i’ve helped! Good luck with your project