Some things that may still be growing exponentially with short doubling periods (<10 years).
- Bits and bytes being generated per month.
- Energy consumption of datacentres
- Energy consumption of computing devices
- Storage shipped and implemented (spinning disks and non-volatile memory)
- Phone shipments
- Total processing power in Mips, Flops or whatever.
- Solar & Wind power installations in name plate capacity
- Plastic production?
Others? Numbers?