Multiethnic schoolchildren and their male teacher holding windmill model having discussion on alternative energies while sitting on grass in public park having outdoor class
Black female teacher giving lesson of alternative energies to group of multiethnic school children working together on DIY layout with windmill models on desk
Medium slowmo of group of diverse elementary school children learning about alternative energies from their teacher, standing with windmill models outdoors at quay
windmill energy alternative ecology animation
energy windmills alternative ecology animation
windmill turbine ecology energy alternative animation
Medium shot of African American elementary school girl presenting DIY windmill model to Black female teacher on project of alternative energy
Aerial view of windmill turbine farm in green forest, alternative energy concept
Alternative green energy source. Blades of windmill rotate close-up on background of blue sky. Nature. Ecology
Solar panels are an alternative source of energy. Many plates on the field.
Windmills in brown desert. Wind power. Generator blades rotate. Alternative energy. Source energy without harmful emissions. Scorched earth
Solar panels along the road. Solar powered lanterns. Renewable energy sources. Alternative energy sources.