Generation Carbon: It’s time to start. The greenhouse e昀昀ect. In 30 A.D., a Roman king requested cucumbers for breakfast. When it was too cold to grow cucumbers outside, the King’s servants built the 昀椀rst greenhouse. A greenhouse allows light from the Sun to go through its glass roof, so plants have the light they need to grow. The glass roof also helps keep the “Mum, it hasn’t been raining heat inside to keep the plants warm. This for so long and it’s bad. We allows gardeners to grow plants even need to water the plants in when it’s too cold to grow them outside. the garden more often.” 18 | Check out The Carbon Almanac to learn more. Matilde R., 8 years old, Bologna, Italy