David MacKay FRS: Sustainable Energy - without the hot air: Contents. Individual Figures - Sustainable Energy - without the hot air - David MacKay. Figure233.eps.png (PNG Image, 1613×1179 pixels) - Scaled (62%) Figure235.eps.png (PNG Image, 1292×1850 pixels) - Scaled (40%) Figure235.png (PNG Image, 432×618 pixels)