Yes–there are issues with security, availability, and privacy in the cloud, but these will have to be managed (cf. some of the links below). The energy aspect is usually not brought to the table in the current discussions on Cloud Computing.
But it is an important aspect (and added benefit) of cloud computing–the achievable savings in energy consumption. Our computing centers are using a significant amount of energy today. Anything that can be done to reduce energy consumption will benefit our planet and cut costs of operation. See the report quoted below.
- Privacy & Security in Cloud Computing [Jon Claiborne] (ecademy.com)
- New Study: Cloud Computing Can Dramatically Reduce Energy Costs and Carbon Emissions (prnewswire.com)
- Cloud Computing: From Designer Clothes To Prêt-à-Porter (ponderingtechnology.wordpress.com)
- Securing the Cloud: Cloud Computer Security Techniques and Tactics (365.rsaconference.com)