1: pavement waterfall art 

• To create an illusion of a cliff face/drop on a flat surface.
• He probably used spray paint and possibly some oil pastels and maybe some chalk.
• I think people should take away the thought that fear is just and illusion , just as the drop is an illusion.

2. GlasGlow grapes

• To put nature into to life
• Wires and led lights
• You can pass it every day and it absent mindedly ignore it, but only when it is lit up, you will notice it.

Plastic bottles as water 

•  That we use more plastic than water.
• plastic bottles and a tap.
• To use less plastic in everyday life.