The role of carbon dioxide is detailed in a CANNA Research article. Also in this edition of CANNAtalk: Grow It Yourself gives a few little tips about growing bonsai trees. A discussion on pH issues in the Grower’s Talk chapter! Plus, Factographic tells you all about Caves. Pests and Diseases highlights springtails. The future of hip hop is discussed in this edition of What’s Happening. Finally, in the Grower’s Tip: celebrate your CO2 sensor.