Answered

Discover the best answers at Westonci.ca, where experts share their insights and knowledge with you. Explore our Q&A platform to find reliable answers from a wide range of experts in different fields. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

The Keeling curve shows that carbon dioxide concentration in Earth's atmosphere
reached _____ ppm in 2013.
a) 250
b) 300
c) 350
d) 400

Sagot :

The answer is c) 350 I’m pretty sure
Thank you for choosing our service. We're dedicated to providing the best answers for all your questions. Visit us again. We appreciate your time. Please come back anytime for the latest information and answers to your questions. Your questions are important to us at Westonci.ca. Visit again for expert answers and reliable information.