Improvement

Technology

Shields

Gold

Description

Palace

Masonry

100

0

Eliminates corruption and waste in the city, and decreases it in all nearby cities

Barracks

None

40

1-2-3

City produces Veteran ground units. Ground units can be completely repaired in a single turn

Granary

Pottery

60

1

Only half of city's food store is depleted when city increases in size

Temple

Ceremonial Burial

40

1

Up to two discontented citizens are made content (+1 with Mysticism)

Marketplace

Currency

80

1

Increases tax and luxury output by 50%

Library

Writing

80

1

Increases science output by 50%

Courthouse

Code of Laws

80

1

Decreases corruption by 50%%. Makes city more resistant to bribery by enemy diplomats and spies. Under Democracy,

one content citizen becomes happy

City Walls

Masonry

80

0

Units in city are tripled on defense versus ground attacks (except howitzers)

Aqueduct

Construction

80

2

Allows city to increase beyond size 8

Bank

Banking

120

3

Increases tax and luxury output by an

additional 50% (cumulative w/ Marketplace)

Cathedral

Monotheism

120

3

Makes three unhappy citizens content (+1 Theology, -1 Communism)

University

The University

160

3

Increases science output by an additional

50% (cumulative w/ Library)

Mass Transit

Mass Production

160

4

Eliminates pollution caused by population

Colosseum

Construction

100

4

Three unhappy citizens are made content (four w/ Electronics)

Factory

Industrialization

200

4

Increases resource production in city by 50%

Mfg. Plant

Robotics

320

6

Increases resource production by an additional 50% (cumulative w/ Factory)

SDI Defence

The Laser

200

4

Protects everything within three spaces of the city from nuclear attack

Recycling Center

Recycling

200

2

Decreases the pollution caused by factories by 2/3

Power Plant

Refining

160

4

Increases factory output by 50%

Hydro Plant

Electronics

240

4

Increases factory output by 50%. Cleaner

than Power Plant, and generally safer than Nuclear Plant (-50% of shield pollution)

Nuclear Plant

Nuclear Power

160

2

Increases factory output by 50%. Cleaner

than Power Plant (same as Hydro Plant), but there is a risk of Nuclear Meltdown unless (-50% Pollution) civilization has discovered Fusion

Stock Exchange

Economics

160

4

Increases tax & luxuries output by an additional 50% (cumulative with Marketplace & Bank for a grand total of 150%)

Sewer System

Sanitation

120

2

Allows city to grow beyond size 12

Supermarket

Refrigeration

80

3

Allows squares in the city's radius with the "farmland" improvement (irrigated twice)

to produce 50% more food

Superhighways

Automobile

200

5

All squares in the city's radius with roads

(or railroads) produce 50% more trade. Increases revenue from trade routes

Research Lab

Computers

160

3

Increases science output by an additional 50% (cumulative with Library and University for a grand total of 150%)

SAM Missile Battery

Rocketry

100

2

Units in city are doubled on defense against air units and non-nuclear missile units

Coastal Fortress

Metallurgy

80

1

Units in city are doubled on defense against shore bombardment by enemy ships

Solar Plant

Environmentalism

320

4

Increases factory output by 50%. Cleaner than all other forms of power. Eliminates shield pollution  - Slows Global Warming

Harbor

Seafaring

60

1

All ocean squares in the city's radius produce one extra unit of food

Offshore Platform

Miniaturization

160

3

All ocean squares in the city's radius produce one shield

Airport

Radio

160

3

Any air unit spending its entire turn in the city is completely repaired. Allows Airlifting of units

Police Station

Communism

60

2

Decreases unhappiness caused by troops away from (home) city by 1

Port Facility

Amphibious Warfare

80

3

City produces veteran naval units. Any ship spending its entire turn in the city is completely repaired

SS Structural

Space Flight

80

0

SS Component

Plastics

160

0

SS Module

Superconductor

320

0

Capitalization

The Corporation

600

0

Converts production into trade