Many improvements use more than one flag. The 45 in CTP improvements use 37 different type of flags. I included explanations of some flags that might not be clear.

PRODUCTION_PERCENT PRODUCTION_TYPE_KNOWLEDGE X (%)
PRODUCTION_PERCENT PRODUCTION_TYPE_GOLD X (%)
PRODUCTION_PERCENT PRODUCTION_TYPE_FOOD X (%)
PRODUCTION_PERCENT PRODUCTION_TYPE_PRODUCTION X (%)
SCIENCE_PER_POP 0.X	+ .X science per citizen
GOLD_PER_CITIZEN X
LOWER_OVERCROWDING -X
POLLUTION_BONUS X or -X
HAPPY_INC X
HAPPY_INC_SWITCH X	effect is reduced or increased for specific gvmts
GOVERNMENT_X X
SILO	X reduces food needed to grow pop one by X %
CAPITOL	reduces crime and unhappiness is nearby cities
CITY_WALLS	protects against attacks from land
FORCE_FIELD	protects against all attacks
IS_RELIGIOUS	???
CATHEDRAL	happiness doubled with Hagia Sophia effect
AIRPORT	needed for airlift effect (?)
TELEVISION	related to Hollywood wonder effect
DEFENDERS_BONUS X	+ defense of units by X / 10
PREVENT_CONVERSION X (%)
PREVENT_SLAVERY (100%)
LOWER_CRIME .X
ALLOW_GRUNTS	allows laborers
LOWER_PEACE_MOVEMENT -.X	reduces war unhappiness by X%
MOVEMENT_TYPE_IS_REFUELED MOVEMENT_TYPE_AIR	allows airlifts
POLLUTION_CLEANER -X	reduces worldwide pollution by X
DOUBLE_TELEVANGELISTS	increases televangelist effect
PROTECT_FROM_NUKES	protects against nuke attacks in city radius
PROTECT_FROM_BIO_AGENTS
PROTECT_FROM_NANO_VIRUS
SPACE_LAUNCH	allows units to enter space
FOOD_VAT 1	increases food at cost of additional pollution
for each food created until +5
NO_UNHAPPY_PEOPLE	happiness permanently set at 75%
NO_RUSH_BUY_PENALTY	rush buy costs 1 gold for 1 production
CANT_BUILD_IN_SPACE
CANT_BUILD_IN_SEA

By Harlan Thompson

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