4K HD Wallpaper: Green Energy
A field with wind turbines can be seen in this 4K image taken by Henrique Pinto in Palm Springs, California. The photography is completely free under CC0 license and can be saved for use in non-commercial (desktop background, homescreen phone) and commercial projects (blogs, apps, templates).
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)