The cellphone system proved cheaper to run and gave farmers near-instant access to their information.
Later, dredgers and steam shovels operated by European labourers took over, and, as dredging proved cheaper than dry excavation, the terrain was artificially flooded and dredged wherever possible.
In Cape Town, South Africa, for example, it proved cheaper to restore the town's watershed to its native vegetation than to divert water from elsewhere, or to create reservoirs.
The designs are new, they say, and costs will fall as more are built; in Asia reactors built at the end of a batch have proved cheaper than earlier ones.
On Comparethemarket.com, third-party cover was more expensive than fully comprehensive insurance in each of the scenarios, but third party, fire and theft proved cheaper in three of the seven cases.
The system of bounties that remained after the end of Soviet-era aerial hunts has proved cheaper on a per head basis, though less effective in reducing overall wolf numbers, according to a summary of a debate in the Yakutia regional legislature published on its Web site.
This produced a smoother track and the whole assembly proved cheaper than using conventional sleepers for broad-gauge track, although this advantage was lost with standard- or mixed-gauge lines because of the higher ratio of timber to length of line.
Through the 2020s, and beyond if gas proves cheap, we expect it to continue to play a key role ensuring that we have sufficient capacity both to meet everyday demand and complementing an increasing amount of relatively intermittent and inflexible generation.
The proposed smart system shows significant advantages over current strain-measurement devices, proving cheap, durable, easy to install, robust to mechanical shocks and chemical aggression.
